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首页> 外文会议>Lasers in Dentistry XI; Progress in Biomedical Optics and Imaging; vol.6 no.2 >Cervical microleakage in root canals treated with Er:YAG and Nd:YAG laser
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Cervical microleakage in root canals treated with Er:YAG and Nd:YAG laser

机译：Er：YAG和Nd：YAG激光治疗的根管宫颈微漏

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Cervical microleakage was evaluated in sealed root canals previously treated with Er:YAG and Nd:YAG lasers. Ninety-two single-rooted maxillary human canines were prepared with the crown-down technique and irrigated with distilled and deionized water. The samples were distributed randomly into 9 groups of 10 teeth each. One tooth was used as a positive control and one as a negative control. In group I, 1.2 ml of EDTAC was applied during 5 min. In groups II to V, radicular dentine was irradiated with Er:YAG laser (Opus 20, Opus Dent, Israel) at the following parameters: 200 mJ and 8 Hz, 200 mJ and 16 Hz, 400 mJ and 8 Hz, or 400 mJ and 16Hz, respectively, for 60 s. In groups VI to IX, radicular dentine was irradiated with Nd:YAG laser (Fotona Medical Lasers, Slovenia) at 10 Hz and 1 W, 10 Hz and 2 W, 15 Hz and 1 W, or 15 Hz and 2 W, respectively, for 60 s. The canals were then sealed by the lateral condensation technique with an epoxy resin-based sealer. The roots were immersed in India ink for 15 days and then cleared to visualize the level of cervical microleakage with a measurement microscope. The results were evaluated by the Kruskal-Wallis test, which showed no statistical significance (p>0.01) for parameter variations of the Er:YAG laser when compared to the control group. However, the increase in frequency and potency for Nd:YAG laser decreased the microleakage when compared to the control group.
机译：在先前用Er：YAG和Nd：YAG激光处理过的密封根管中评估宫颈微渗漏。用冠下技术制备了九十二个单根上颌人类犬，并用蒸馏水和去离子水灌溉。将样本随机分为9组，每组10颗牙齿。一颗牙齿用作阳性对照，另一颗用作阴性对照。在第一组中，在5分钟内应用1.2 ml的EDTAC。在II至V组中，用Er：YAG激光（Opus 20，Opus Dent，以色列）以以下参数辐照放射性牙本质：200 mJ和8 Hz，200 mJ和16 Hz，400 mJ和8 Hz或400 mJ和16Hz分别持续60 s。在VI至IX组中，分别以10 Hz和1 W，10 Hz和2 W，15 Hz和1 W或15 Hz和2 W的Nd：YAG激光（斯图尼亚的Fotona Medical Lasers）辐照放射性牙本质，持续60 s。然后用基于环氧树脂的密封剂通过侧向冷凝技术将管密封。将根浸入印度墨水中15天，然后用测量显微镜清理以观察宫颈微渗漏的水平。结果通过Kruskal-Wallis检验进行评估，与对照组相比，Er：YAG激光的参数变化无统计学意义（p> 0.01）。但是，与对照组相比，Nd：YAG激光的频率和效能的增加降低了微渗漏。

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